graphql_example.js

var schema = `
  enum Gender {
    MALE
    FEMALE
  }
  type Movie {
    id: ID!
    title: String!
    year: Int
    actors: [Actor]
  }
  type Actor {
    fname: String!
    mname: String
    lname: String!
    dob: String!
    gender: Gender
  }
  type Query {
    movie(id: ID!): Movie
  }
`;
/*
  returns a hash like this:
  {
    id: 12345,
    marquee: {
      title: "The Matrix"
    },
    year: 1999
  }
*/
function getMovie(movieId) {
  //Get a movie from somewhere
}

/*
  returns a hash like this:
  {
    name: {
      first: "Keanu",
      middle: "",
      last: "Reeves"
    },
    dob: "9/2/1964",
    gender: "M"
  }
*/
function getActorsForMovie(id) {
  //Get the actors for a movie
}

var resolvers = {
  Query: {
      movie(obj, { id: movieId }, ctx) {
        //call an API that gets a movie
        let movie = getMovie(movieId);
        return movie;
      }
  },
  Movie: {
    id(movie, args, ctx) {
      return movie.id;
    },
    title(movie, args, ctx) {
      return movie.marquee.title;
    },
    //etc..
    actors({ id: movieId }, args, ctx) {
      // call an API to get all Actors for a Movie
      let actors = getActorsforMovie(movieId);
      return actors;
    }
  },
  Actor: {
    fname(actor, args, ctx) {
      return obj.name.first;
    },
    //etc...
    gender(actor, args, ctx) {
      return obj.gender == 'M' ? "MALE" : "FEMALE";
    }
  }
}